Phase Diagram Of Carbon Dioxide

At a temperature of 1975 k 785 o c the vapor pressure of solid carbon dioxide is 1 atm 760 torr. The critical temperature for carbon dioxide is 311c and the critical pressure is 73 atm.

Phase Diagram Notes

It is impossible to get any liquid carbon dioxide at pressures less than 511 atmospheres.

Phase diagram of carbon dioxide. For full table with imperial units rotate the screen. Liquid carbon dioxide forms only at pressures above 51 atm. The critical point is 738 mpa at 311 c.

The triple point of carbon dioxide is about 51 bar 517 kpa at 217 k see phase diagram. Temperature pressure diagram s a t u r at i o n li ne. Thus solid carbon dioxide is called dry ice because it does not go through a liquid state in its phase transition at room pressure.

The phase diagrams of water and carbon dioxide are compared here. Values are given for gas phase at 25 o c 77 o f 298 k and 1 atm if not other phase temperature or pressure given. That means that at 1 atmosphere pressure carbon dioxide will sublime at a temperature of 78c.

The phase diagram for carbon dioxide. The phase diagram of carbon dioxide shows that liquid carbon dioxide cannot exist at atmospheric pressure. Its melting point decreases with increasing pressure because ice is less dense than liquid water.

However if we examine the phase diagram of water we will find a important difference. Chemical physical and thermal properties of carbon dioxide. The triple point of carbon dioxide occurs at a pressure of 52 atm 3952 torr and 2166 k 564 o c.

Above the critical temperature the fluid is called super critical fluid. The only thing special about this phase diagram is the position of the triple point which is well above atmospheric pressure. Water has an unusual phase diagram.

Consequently solid carbon dioxide sublimes directly to a gas. Carbon dioxide phase diagram. Another form of solid carbon dioxide observed at high pressure is an amorphous glass like solid.

Most substances have the phase diagram that mimics that of carbon dioxide. Unlike carbon dioxide and most other substances the phase diagram of water shows a negative slope for the boundary line between the liquid and solid state.

Answer The Following Questions Based On The P T Phase